Health is not only mere absence of disease but also includes the state of complete physical, mental, and social well being of an individual. In other words it means a sound physical and mental state of the individual. A person's ability to work depends upon his health. A healthy person can contribute more actively Hence, health and development of a person are the integral parts of a nation's social and economic development.
(ii) It is very difficult to assess public health in terms of the single set of measures. So, various other indicators have been taken into account, like infant mortality rate, maternal : mortality rate, life expectancy and nutrition
level along with the communicable and non- communicable disease.